حَدَّثَنَا أَسْوَدُ بْنُ عَامِرٍ ثَنَا أَبُو بَكْرٍ عَنْ مُطَرِّفٍ قَالَ: أَتَوْا قُبَّةً فَاسْتَخْرَجُوا مِنْهَا رَجُلًا فَقَتَلُوهُ، قَالَ: قُلْتُ: مَا هَذَا؟ قَالُوا: هَذَا رَجُلٌ دَخَلَ بِأُمِّ امْرَأَتِهِ فَبَعَثَ إِلَيْهِ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ فَقَتَلُوهُ
It is narrated from Sayyiduna Mutarrif, he says: Some people came to a tent, they brought a man out from there and killed him. I asked: What is this? They informed me that this is the man who married his wife's mother. The Noble Prophet (peace and blessings be upon him) sent those people towards him, so they killed him.